WIND TUNNEL TEST ON AERODYNAMIC UNSTABLE VIBRATION OF INVERTED Y TOWERS OF NEW HYBRID STRUCTURE

Li Yijia; Wang Xiaodun; Yu Jianxing

doi:10.13204/j.gyjz201211023

Volume 42 Issue 11

Dec. 2014

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Li Yijia, Wang Xiaodun, Yu Jianxing. WIND TUNNEL TEST ON AERODYNAMIC UNSTABLE VIBRATION OF INVERTED Y TOWERS OF NEW HYBRID STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(11): 106-110. doi: 10.13204/j.gyjz201211023

Citation:

Li Yijia, Wang Xiaodun, Yu Jianxing. WIND TUNNEL TEST ON AERODYNAMIC UNSTABLE VIBRATION OF INVERTED Y TOWERS OF NEW HYBRID STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(11): 106-110. doi: 10.13204/j.gyjz201211023

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WIND TUNNEL TEST ON AERODYNAMIC UNSTABLE VIBRATION OF INVERTED Y TOWERS OF NEW HYBRID STRUCTURE

doi: 10.13204/j.gyjz201211023

1.
1. School of Civil Engineering,Tianjin University,Tianjin 300072,China;
2.
2. School of Management,Tianjin University of Technology,Tianjin 300384,China

Rev Recd Date: 2012-05-20
Publish Date: 2012-11-20

Abstract

Abstract

Tianjin Cihai Bridge is a hybrid structure of new cable-stayed bridge with giant wheel．Three wind tunnel models of hybrid structure were established in order to comprehensively understand and judge the structure's dynamic characteristics of wind action,and to study the vibration phenomenon by air wake．With tunnel test,wind force coefficients from different wind angel between the directions of bridge axis were acquired,and through the experimental observation and data analysis the phenomenon of vibration by air wake was judged.The result shows that the phenomenon of vibration by air wake will not occur after completion of the overall structure,but in the construction of the main tower only,if the design wind speed is close to the resonant wind speed the phenomenon of vibration by air wake will occur．The measure of setting partitions between the inverted Y towers can be used to improve the stiffness of the main tower,and then to avoid the occurrence of unstable vibration by air wake．
- wind tunnel test,
- hybrid structure,
- local wind force coefficient,
- vibration by air wake

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References(7)

References

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